Spindle for wire covering machines



April 11, 1933. E. DOWALD 1,903,698

SPINDLE FOR WIRE COVERING MACHINES Filed June 24, 1930 Inventor.-

Patented Apr. 11, 1933 a r 1 903 593? UNITED STATES PATENT orca, EUGENDOWALD, or wurrnnren-nnnnnrnnn, GERMANY it srINDLE non WIRE COVERINGMACHINES Application filed June24, 1930, Serial No. 463,408, and inGermany February 7, 1930.

The spindles for wire covering machines bearing is mounted on the axlecore 6, and its rotating on a vertical longitudinally bored outer ring 6is pressed tightly against the axle are open to the objection in theknown lower groove pulley 3 by the cap nut 7. The construction, that thelubrication of their balls of the upper ball bearing 5 are situated 5bearing points can only be carried out when only in a ball cage on anextension 7 at the 5 the spinner is standing still. Moreover as theupper end of the axle and run directly on bobbin axle is overhanging,that is only supthe axle in an annular groove therein. Owing f ported atthe lower nd, th spindles are ubto the omission of the inner race inthis ball jected to considerable axle friction, which b aring the boreof the axle may be as wide g not only causes a great consumption ofpower as P l l v 60 for the covering machine but also an ir- Thepressure Channels 8 o the b i regular revolving speed of the spindles,rex en in he xle 0f the spind e in longif sulting in irregular coveringof the wire, as tudlnal dllectlonrand are formed y g j the wire is drawnthrough the spindle at unitudinal grooves in the axle core 6 and by aform speed. According to the invention the sleeve 9 shpped thereover.The pressure spindle has an oil hole at, its low r end, fro channelsterminate at their lower end in an which the lubricant, pressed in b asqui t annular groove 10 of the axle, and attheir whilst the spindle isrunning, can be supupper end in the upper ball bearlng 5. An plied tothe bearing points. It is also new automatically closing lubricatingnipple 11 for the bearings of the thread bobbin carrier with ballclosure is carried by a short sleeve to be situated at a great distanceapart on 11 placed on the outer side of the lubricating both ends of thethread bobbin and for the groove 10. The lubricant is forced by alubricant to be supplied first to the upper squirt, adapted to be fittedon the nipple 11, hearing through the pressure channels prothrough thechannels 8 into the upper ball vided in the spindle axle, after which itruns bearing 5 and the excess oil flows over the over the outer surfacethereof to the lower outer surface of the sleeve 9 into the lowerbearing. The pressure channels are longiball bearingl and lubricatessame. tudinal grooves in the spindle axle, which is The oil feedchannels situated in the axle enclosed by a sleeve. might be made insome other manner than The forcing in of the lubricant by a squirt thatdescribed. It is possible with the spinensures the lubricant reachingthe bearing dle described, to cover a rubber thread or points and at thesame time prevents clogging any other thread instead of the wire in a ofthe lubricating channels. The bearing of similar manner. the bobbincarrying sleeve on both ends of the I claim a thread bobbin causesextremely quick and 1. Inaspindle for wire covering machines,

uniform running of the spindle. a stationary supporting shaft having ape- An embodiment of the invention is illusripheral channel adjacent itslower end and trated by way of example in the accompanyprovided withlongitudinal grooves extending drawing in which: ing upwardly from thechannel to the top of 40 Fig. 1 shows the spindle in longitudinal theshaft, a short sleeve on said shaft coversection. ing the channel andthe lower portions of the Fig. 2 is a cross-section on line 22 ofgrooves, an oil connection carried by the short Fig. 1. sleeve andcommunicating with said channel,

The spinning arms 2 are mounted on the a ball bearing on said shaftimmediately running sleeve 1 of the spindle on which the above saidshort sleeve and having an inner bobbin is placed. The running sleeve israce fitting the shaft and forming an outer driven by the groove pulley3 and runs on the wall for said grooves immediately above thelongitudinally bored axle core 6 by means of short sleeve, a long sleevefitted on the shaft the lower ball bearing 4 and upper ball bearandextending from the ball bearing to the ing 5. The inner race 5? of thelower ball top of the shaft, an extension on the upper end of the shaft,a second ball bearing engaged on the extension, and a hollow spindleadapted to support a bobbin and supported on said bearings in spacedrelation to said sleeves and extension.

2. In a spindle for wire covering machines,

a stationary supporting shaft having a pe-v ripheral channel adjacentits lower end and I provided with longitudinal grooves extendingupwardly from the channel to the top of the shaft, a short sleeve onsaid shaft covering the channel and the lower portions of the grooves,an oil connection carried by the short sleeve and communicating withsaid channel, a ball bearing on said shaft immediately above said shortsleeve and having an inner race fitting the shaft and formingan outerwall for said grooves immediately above the short sleeve, a long sleevefitted on the shaft and extending from the ball bearing to the top ofthe shaft, an extension on the upper end of the shaft, a second ballbearing engaged on the extension, a hollow spindle adapted to support abobbin and supported" on said bearings in spaced relation to saidsleeves and extension, said extension and shaft being tubular to providea passage for the wire to be covered, and a cap, on said hollow shaftcarrying a pair of fiyer arms and having an opening alined with thehollow v shaft.

In testimony whereof I aflix my signature;

EUGEN noWALnv

